#include <stdio.h>
#include <string.h>
#include <unistd.h>

int main()
{
    //C语言函数
    printf("hello printf\n");
    fprintf(stdout,"hello fprintf\n");

    //system
    const char *msg = "hello write\n";
    write(1, msg, strlen(msg));


    fork();
    return 0;
}

